Hydraulic operated pump



March 29, 1932 c. 1.. EVANS L HYDRAULIC OPERATED PUMP .F'iled Sept. 24, 1950 ,2 Shets-Sheet 2 INVENTOR. 64pm. L. EVA/-45 BY ATTORNEYS.

Patented Mar. 29, 1932 UNITED STATES V CAROL. L. EVANS, 0F TIPTON, CALIFORNIA 7 HYDRAULIC. OPERATED IPUMP Application filed September 24, 1930. Serial No. 484,196.

My invention relates to improvementsin hydraulic operated pumps, and it consists in the combinations, constructions and arrangements hereinafter described and claimed.

An object of my invention is to provide a hydraulic operated pump which may be submerged in the liquid it pumps. and which is connected to a mechanical pump by hydraulic-actuated means. This enables the mechanical pump to be placed a considerable distance away from the hydraulic pump.

A further object of my invention isto provide a device of the type described which is simple in construction and durable and efficient for the purpose intended.

Other objects and advantages will appear as the specification proceeds, and the, novel features of the device will be particularly pointed out in the claims hereto annexed.

My invention is illustrated in the accompanying drawings, in which '7 Figure 1 is a side elevation of the (181 7106,

Figure 2 is a transverse section, portions being shown in elevation,.

Figure 3 is a section along the line 33 of Figure 2,

Figure 4 is a vertical section through a modified form of the device,

Figure 5 shows another modified form of the device, and

Figure 6 is a section along the line 6-6 0 Figure 5. In carrying out my invention I provlde a housing 1 (see Figure 2)- that is divided into two fluid compartments A and B by flexible diaphragms 2 and 3. Figure 1 shows how the diaphragms are secured in place by the same fastening means l that secures the headers 5 of the housing 1 in place.

A piston 6 is slidably mounted in the central portion of the housing 1 and is connected to the diaphragms 2 and 3-at 7 and 8. The piston has a slot 9 thereinfor receiving an eccentric 10, the latter being mounted upon a shaft. 11 which is rotated by a pulley 12. The pulley is driven byany means desired. It will be seen from this construction that a rotation of'the pulley 12 will reciprocate the piston 6 and will vary the size of the compartmentsA and B. I u

Conduits 13 and 14' connect the compartments A and B to compartments C and D in a hydraulic pump casing 15. Diaphragms 1'6 and 17 form the inner walls of the compartments C and D, and these diaphragms are secured in place in the same manner as the diaphragms 2 and 3 are secured in place.

The movement of the piston 6 to the right in Figure 2 will force fluid from the compartment B into the compartment D, and this will cause the diaphragm 17 to flex to the left. The same movement of the piston 6 to the right will 'causethe diaphragm 2 to flex to the right, and this will enlarge the compartment A, Thediaphragms 16 and 17 are connected to each other by bolts 18 and sleeves 19 so that a flexing of the diaphragm 17 to the left will cause a similar flexing of the diaphragm 16 to the left. The diaphragm 16 will force fluid from the compartment C to the compartment A. A movement of the piston 6 to the left will have an opposite effect on the diaphragms 16 and 17 and will flex them to the right due to the fluid connection-between the diaphragms 2 and?) and the diaphra-gms 16and 17.

The diaphragms 16 and-17 form the flexible walls of inner compartments E and F which are used for pumping'a fluid that en ters inlet pipes 20 and 21finto outlet pipes 22 and 23, the latter two pipes being connected to a common pipe 24 by means of a header 25. The compartments E and F are separated from each other by a partition 26, this partition having enlarged openings 27 therein for receiving packing consisting of small diaphragms 28. The sleeves 19 bear against the di'aphragms 28 and cause them to flex in the same manner as the diaphragms 16 and 17. The diaphragms 16 and 17 are connected to the bolts 18 by flat crosspieces29. I r I From the foregoing description of the Va rious parts of the device, the operation thereof may be readily understood.

Check valves 30 and 31 are placed in the entrance pipes 20 and 21 andother check valves 32 and 33 areplaced in the outlet pipes the diaphragms 16 and 17 to flex. The flexing of the diaphragms will vary the size of the inner compartments E and F, and when these compartments are made larger in size they will suck in fluid through the inlet pipes 20 and 21, and when they are made smaller in size they will force the excess fluid into the pipes 22 and 23 and on into the ipe 24. This results in a pumping action:

which will deliver the fluid pumped to the pipe 24 and the pipe can be extended to the desired place where the fluid iswanted.

In Figures 4, 5 and'6I show slightly modified forms of the invention. Reference to Figure 4 shows a mechanicalpump comprising a casing-5O having a cylindrical portion 51 for receiving a piston 52. This piston is mounted upon a rod 53 that is reciprocated by any means (not shown). The piston 52 divides the cylinder 51 into two chambers G andH that are varied in size by the moving piston. A fluid passageway 54 connects the compartment G with an air dome 55 and a fluid passageway 56 connects the compartment H with an air dome 57. An equalizing valve 58 alternately connects the passages 54 and 56 with a common air dome 59 for a purpose hereinafter described. f

Conduits 60 and 61 extend from the casing 50 to the hydraulic pump 15 which is the same as that shown in Figure 2. This pump needs no further description, and'like reference numerals will be applied to similar parts. a Fluid passageways 62 and 63 place the conduits 60 and 61 in communication with the compartments G' and H. 'Another fluid passageway 64 connects the passageways 62 and 63 witha fluid storage tank 65. Check valves 66 are placed at the ends of the. passageway 64 and a. pipe 67 connects the passageway64 with a storage tank 65.

The operation of this form of the. device is as follows: The piston rod 53 is reciprocated, and this causes the compartments G and H to change in capacity and to intermittently-force fluid down intothe compartments C and D of the hydraulic pump 15. This will cause the pump to suck in fluid through the inlet pipes 20 and 21 and to force this fluid into the outlet pipe 24 as already described.

The purpose of the air chambers 55 and 57 is. to provide a yielding quality to the fluid mediumas thismedium is forced by the piston 52 out and into the compartments G and H. Should the travel of piston 52 cause the compartment G to enlargeand compartment H to become smaller, valve 58 wouldv automatically disconnectthe passage 54 from the air dome 5 9 and by the same action, the passage 56 would connect with the air dome 59. Should the amount of fluid in the compartment H be greater than the capacity of the pump 15 on that stroke of the piston 52, the surplus fluid would be stored in the air chamber 59 and on the reverse movement of the piston 52, this surplus fluid would be transferred to the compartment G. The action is reversed in the reverse movement of the piston 52. This type of construction is practical in operation without the valve 58 and the air dome 59, but the addition of these gives an added safety factor.

In case any of the fluid is lost by leakage or the like, the piston 52 will draw fluid from the tank into the passageways 62 and 63, this fluid passing through the check valves 66. The check valves prevent the return'of the fluid to the tank.

In Figures 5 and 6 I show a slightly modi-. fied form of central partition for the hydraulic pump 15. This partition 7:5 is provided with packing glands 76 that slidably receive sleeves 77 which take the place of'the' sleeves 19. The packing glands take the place of the packing diaphragms 28. The

flexing of the diaphragms 16 and 17 in the form of the device shown in Figure 5 will vary the size of the compartments E and F so that these will suckin fluid through the inlet pipes 20 and 21 and will force this fluid out through the pipe 24. In all other re 11 spects this form of the device is identical to that shown in Figures 2 and 4, and therefore further description is not needed.

Although I'have shown and described severalembodiments of my invention, it is to be understood that the same is susceptible of various changes, and I reserve the right to employ suchchanges as may come within the scope of the claims hereto annexed. I

I claim: 5

1. Ina hydraulic pump, a casing having a central partition. two diaphragms cooperating with the partition for dividing the casing into two pumpingcompartments, one being disposed onneach side of. the partition, and two liquid control compartments, inlet and outlet. pipes :for' each' pumping compartment, check valves for the pipes, hydraulic means for varying the capacity of the control compartments for flexing the diaphragms, whereby the diaphragms will vary the capacity of the pumping compartments, said means including a chamber communicating with each control compartment, and means for. alternately forcing additional liquid into and out from said chambers.

i 2. In a hydraulic pump, a casingihaving a central partition, two diaphragmscooperating with the partition for dividing the casing into two p'umpingcompartments, one being disposedon each side of the partition, and

two liquid control compartments, inlet and outletpipes for each pumping compartment, check valves for the'pipes, hydraulic means for varying the capacity of the'control compartments for flexing the diaphragms, whereby the diaphragms will vary the capacity of the pumping compartments, said means ineluding a chamber communicating with each control compartment, means for alternately forcing additional liquid into and out from said chambers, and means for automatically adding liquid to the chambers to take the place of the liquid lost through leakage,

3. In a hydraulic pump, a casing having a central partition, two diaphragms cooperating with the partition for dividing the casing into two pumping compartments, one being disposed on each side of the partition, and two liquid control compartments, inlet and outlet pipes for each pumping compartment, check valves for the pipes, hydraulic means for varying the capacity of the control compartments for flexing the diaphragms, whereby the diaphragms will vary the capacity of the pumping compartments, said means including a chamber communicating with each control compartment, means for alternately forcing additional liquid into and out from said chambers, and air heads for each chamber for absorbing the shock of the moving liquid.

4. In a. hydraulic pump, a casing having a central partition, diaphragm packing forming a part of the partition, a pumping diaphragm placed on either side of the partition and dividing the easing into four compartments, two of the compartments constituting pumping means and the other two control means for the pumping means, and connections between the pumping diaphragms, said connections passing through the packing diaphragms.

5. A casing having a perforated partition dividing it into two compartments, the outer walls of said casing being flexible, connections between the flexible walls, said connections passing through the openings in the partition, and packing diaphragms extending from the connections and sealing the openings.

CAROL L. EVANS. 

